Alarm.



No. 811,061. PATENTED JAN. 30, 1906. G. A. HILL.

ALARM.

APPLICATION FILED OCT. 26. 1904.

UNITED STATES PATENT OFFICE.

GEORGE AUGUSTUS HILL, OF CHICAGO, ILLINOIS.

ALARM.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed October 26, 1904. Serial No. 230,022.

To all whom it may concern:

Be it known that I, GEORGE AUeUsTUs HILL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Alarms, of which the following is a specification.

This invention relates to certain improvements in alarms, and more particularly in that class of detonating alarms which are adapted to be actuated by the unauthorized opening of doors, windows, and the like to give warning of the entry of the premises; and the object of the invention is to provide a device of this general character of a simple and inexpensive nature which shall be readily applicable to various locations for use and which shall be capable of ready and convenient adjustment into and out of position for operation, so that when desired free access may be had at the door, window, or other situation whereat the improved alarm device is arranged without likelihood of the accidental operation of the same.

The invention consists in certain novel features of the construction, combination, and arrangement of the several parts of the improved alarm device whereby certain important advantages are attained, and the de vice is rendered simpler, cheaper, and otherwise better adapted and more convenient for use, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the claims.

In the accompanying drawings, which serve to illustrate my invention, Figure 1 is an elevation showing the location of the improved alarm device at a door to guard the same against unauthorized entry, and Fig. 2 is a sectional view taken through the door and its casing and showing the improved alarm. device in plan. Fig. 3 is an end view of the frame or body portion of the device, showing the detent device for holding the alarm device in position for operation when set for use. Fig. 4 is a sectional view taken through the meeting-rail of a window-sash and showing in elevation the improved alarm device located upon the window frame or casing in position to give warning of unauthorized raising of said sash.

Referring first to Figs. 1, 2, and 3, 1 indicates the frame or body portion of the device, preferably made in the form of an elongated and flattened metal strip, having correspondingly arranged and perforated lugs or projections 2 2 at opposite sides and extended above its upper surface, a screw 3 being passed throu h said lugs or projections after the fashion of a pivot-pin and being of such length as to permit its threaded end portion 4 to protrude at one side of the device in position for convenient engagement in a door or Window casing or other part adjacent to the door, window, or other situation to be guarded.

Upon the screw 3, between the lugs or projections 2 2 of the frame or body portion, is coiled a stout spring 5, one end portion 6 of which is bent and adapted for engagement upon the top surface of the frame 1. in advance of the lugs 2 2 and the opposite end portion 7 of which is bent first at an angle,

a waythat its extremity 13 is caused to extend at some distance in front of the frame.

The forward end of the frame or body portion 1 is upbent, as seen at 9, so as to extend at right angles above said frame, and at its opposite sides said upbent forward end 9 of the frame is provided with projections or detents 8 8, extended in opposite lateral directions and adapted each to be engaged with the centrally-extended extremity 18 of the end portion 7 of spring 5in such a way as to hold said spring under tension with said extremity 13 extended in advance of the upbent forward end portion 9 of the frame.

Upon the forwardlyextended extremity 13 of the end portion 7 of the spring is carried a head or holder 11, adapted to receive and hold a detonating-cap of any desired kind, and when the extremity 13 of the arm 7 of'the spring is disengaged from beneath either of the detents 8 8 at the forward end 9 of the frame the tension of the spring 5 is adapted to throw said arm 7 rearward to the position shown in dotted lines at a; in Fig. 1, whereupon the cap carried by the head or holder 11 is caused to come into forcible contact upon a contact-block 12, carried upon the rear end of the frame or body portion 1, whereby said cap is exploded, so that an audible warning is given by the device.

In applying the device to a door in position for use the protruding threaded end portion 4 of the pivot-screw 3 is screwed into the door frame or casing a, as shown in Figs. 1.

and 2, in such position that the extremity 13 IIO device to doors hinged at either edge.

of the arm 7 of the springwhenengaged with one of the detents 8 8 at the forward end 9 of the frame of the device will stand in position for engagement by the edge of the door I) when the same is moved into opened position, as indicated by the dotted lines in Fig. 2, and when the device is thus located and adjusted with the spring part 13 engaged with the detent farthest from the door I) it is evident that any attempt to move the door into open position will cause the edge of the door to strike upon the extremity 13 of the spring-arm and to force the same laterally out of engagement with the detent 8, whereby the tension of spring 5 is permitted to act to swing said arm 7 rearwardly to the position shown in dotted lines at 90, so that the fulminating-cap carried by head 11 is caused to strike the contact 12 and is exploded.

When the device is located in such position at a door, it is evident that during the: daytime, or when it is not desired to guard against unauthorized entry at the door, the frame or body portion 1 of the device may be pivotally swung upon the screw 3 as a center i to cause the device to assume the position shown in dotted lines at y in Fig. 1, whereby the forwardly-directed extremity 13 of the spring-arm 7 is adjusted out of position for engagement by the edge of the door when the latter is thrown open, so that said door may be freely used without liability of setting off the alarm.

The pivot-screw 3 is removably held in the lugs 2 2 of the frame or body portion, and when desired said screw may be removed from said lugs and reversed end for end, so that its screw-threaded extremity 4 is caused to protrude beyond the opposite side of the frame or body portion; whereby the device is adapted for location at the opposite side of the door frame or casing, provision being thus made for convenient application of the In case of such reversal of the pivot-screw 3 it is evident that the opposite detent Swill also be employed to hold the projecting portion of the spring-arm 7, so that the device may be operative.

In the frame or body portion 1 of the device just to the rear of the lugs or projections 2 2 is formed a screw-opening 14, as seen in Figs. 2 and 4, and this screw-opening is adapted to receive an auxiliary pivot-screw, as shown in the latter figure, when the device is to be applied to windows of ordinary construction, said auxiliary pivot-screwbeing engaged with the window casing or frame 0 in such position as to permit the projecting extremity 13 of the spring-arm 7 to overhang the meeting-rail of the lower sash when the latter is lowered, whereby in case of unauthorized raising of such sash the said rail d is caused to engage and release the extremity 13 of the spring-arm from its detent 8, so that the detonator carried by hBELClII may be struck upon the contact 12 in the way above described to give an alarm to the occupants of the premises.

For permitting of application of the device at opposite sides of windows the pivotscrew 3 need not be reversed; but when the device is used in reverse position from that shown in Fig. ithe spring-arm 13 will of course be engaged with the opposite detent 8 on the upbent end of the frame 1. It will also be obvious that when the device is employed to guard windows it may be swung pivotally upon the auxiliary pivot-screw, so as to stand in or out of position for actuation by the lifting of the sash, whereby when desired the sash may be freely raised without danger of exploding the cap carried by the head 11.

From the above description it will be apparent that the improved alarm constructed according to my invention is of an extremelysimple and inexpensive nature and is especially well adapted for use by reason of the certainty of its operation and the readiness with which it may be applied to doors and windows of different kinds and also of the convenience with which the device may be adjusted out of position for operation when not desired for use, and it will also be obvious from the above description that the improved alarm device is capable of considerable modification without material departure from the principles and spirit of the invention, and for this reason I do not desire to be understood as limiting myself to the precise form and arrangement of the several parts of the device herein set forth in carrying out my invention in practice.

Having thus described my invention, what I claim, and desire to secure by Letters Patent. is-

1. In an alarm device, the combination of j a frame having oppositely-arranged perforated lugs and provided at one end with'a detent and at its opposite end with a contact, a pivot-screw passed through the lugs and provided with a projecting threaded end portion, a spring coiled on the pivot-screw between the lugs with an end portion engaged with the frame and with an arm provided with aholder for receiving a cap, said arm having an extended portion for engagement by a door or window when opened and being adapted for engagement by the detent to hold the spring under tension, and being also adapted, when released from said detent, for pivotal movement to strike the cap upon said contact.

2. In an alarm device, the combination of a frame having oppositely-arranged lugs and provided at one end with a detent and at its opposite end with a contact, a pivot part passed through the lugs, a spring coiled on the pivot part between the lugs with an end portion engaged with the frame and an arm provided with a holder to receive a cap, said arm having an extended portion for engagement by a Window-sash when moved and being adapted for engagement by the detent to hold the spring under tension and being also adapted, when released from the detent, for pivotal movement to strike the cap upon the contact and an auxiliary pivot-screw passed through the frame for engagement with a window-casing and Whereon said frame is adapted to be swung in or out of position for operation.

In testimony whereof I have hereunto signed my name, in the presence of two sub- I 5 scribing witnesses, at Chicago, Illinois, this 22d day of October, 1904.

GEORGE AUGUSTUS HILL.

Witnesses J. D. GAPLINGER, A. MOORE. 

